The control of the oil pressure during the lock-up clutch is done by way of two valves: the relay valve and the signal valve. In such a arrangement the signal valve controls the stress on a person aspect with the relay valve, which controls the pressure while in the lock-up https://torqueconverterclutch29627.isblog.net/the-single-best-strategy-to-use-for-torque-converter-clutch-51401223